Before I give you directions, i got my pull down to around 1.5 mm, it is so short, also a quick mod before you start replace you stock sear spring with braces rubber band, it will make your pull much lighter.

Step 1: Disassemble your m98.

step 2: Look at your back bolt you will notice that there is a spot for where the sear will catch the bolt, you want the sear to catch the bolt but barely catch it. You might want to let the sear to be barely holding on, but you dont want it like it alredy is. Next you will see four pins that hold the sear in place.